Cheesy spinach soup

1/4 cup chopped onion
1 Tbsp. soft reduced calorie margarine
2 cups fat free milk
3/4 lb. (12 oz.) VELVEETA LIGHT Reduced Fat Pasteurized Prepared Cheese Product, cut up
1 pkg. (10 oz.) frozen chopped spinach, cooked, well drained
1/8 tsp. ground nutmeg
Dash Pepper
Total time: 15 min

1. Cook and stir onion in reduced calorie margarine in 2-quart saucepan until tender.
2. Add remaining ingredients; stir on low heat until prepared cheese product is melted and mixture is thoroughly heated.